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A marketing study was conducted to compare the mean age of male and female purchasers of a certain product. Random and independent samples were selected for both male and female purchasers of the product. It was desired to test to determine if the mean age of all female purchasers exceeds the mean age of all male purchasers. The sample data is shown here:
Female: n = 20, sample mean = 50.30, sample standard deviation = 13.215
Male: n = 20, sample mean = 39.80, sample standard deviation = 10.040
1. Write the null and alternative hypothesis 2. Degrees of freedom3. t- critical value4. Calculate t-test statistics5. Decision rule6. Decision7. Conclusion
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